公开(公告)号：US06721384B2

公开(公告)日：2004-04-13

申请号：US10281472

申请日：2002-10-25

申请人： Dongseok Oh ,  Taehyun Chun ,  Wangkee In ,  Keenam Song ,  Hyungkyu Kim ,  Heungseok Kang ,  Kyungho Yoon ,  Younho Jung

发明人： Dongseok Oh ,  Taehyun Chun ,  Wangkee In ,  Keenam Song ,  Hyungkyu Kim ,  Heungseok Kang ,  Kyungho Yoon ,  Younho Jung

IPC分类号： G21C334

CPC分类号： G21C3/322 ,  G21C3/3424 ,  Y02E30/38

摘要： A spacer grid for nuclear fuel assemblies is disclosed. This spacer grid has a plurality of side weld supports, that is, main supports, upper sub-supports and lower sub-supports, on its interlaced inner straps, with two flow mixing vanes integrally extending upward from each of the main supports. This spacer grid is fabricated by seam-welding the interlaced first and second inner straps to each other along the upper axial junction lines of the crossing main and upper sub-supports at the top of the intersections, and along the lower axial junction lines of the crossing lower sub-supports at the bottom of the intersections, thus forming side weld lines at the intersections. This spacer grid reduces the damage of fuel rod during a fuel rod insertion process by decreasing interference between flow mixing vanes and fuel rods, accomplishes a desired soundness by seam welding, improves the coolant mixing efficiency of the flow mixing vanes by excluding welding windows, and reduces hydraulic resistance caused by weld beads.

摘要翻译： 公开了用于核燃料组件的间隔栅格。 该间隔栅格在其交错的内带上具有多个侧面焊接支撑件，即主支撑件，上副支撑件和下副支撑件，其中两个流动混合叶片从每个主支撑件向上整体地延伸。 该间隔栅格是通过沿交叉的顶部与交叉主顶部和上部副支承件的上部轴向连接线将隔行的第一和第二内部带彼此沿缝合焊接而制造的， 在交叉点的底部交叉下部副支撑，从而在交叉点处形成侧面焊接线。 该隔离栅格通过减少流动混合叶片和燃料棒之间的干扰，通过缝焊实现所需的稳定性，从而减少了燃料棒插入过程中燃料棒的损坏，通过排除焊接窗口提高了流动混合叶片的冷却剂混合效率， 降低由焊缝引起的液压阻力。

公开(公告)号：US06714619B2

公开(公告)日：2004-03-30

申请号：US10215996

申请日：2002-08-07

申请人： Dongseok Oh ,  Taehyun Chun ,  Wangkee In ,  Keenam Song ,  Hyungkyu Kim ,  Heungseok Kang ,  Kyungho Yoon ,  Younho Jung

发明人： Dongseok Oh ,  Taehyun Chun ,  Wangkee In ,  Keenam Song ,  Hyungkyu Kim ,  Heungseok Kang ,  Kyungho Yoon ,  Younho Jung

IPC分类号： G21C334

CPC分类号： G21C3/322 ,  G21C3/352 ,  G21Y2002/201 ,  G21Y2002/303 ,  G21Y2004/302 ,  Y02E30/38

摘要： A spacer grid for use in a nuclear fuel assembly has double-deflected vanes that guide an axial flow of coolant around fuel rods and thereby generate swirl flow. The vanes each have a double bend projecting upwardly from first inner straps and projecting toward one fuel rod. The vanes are sufficiently wide at their bases to prevent inadvertent deformation due to contact with fuel rods during an insertion of fuel rods into the cells. The vanes also make a smooth variation in the cross-sectional area of the coolant channel at the outlet of the spacer grid, thus reducing a loss of pressure during reactor operation.

摘要翻译： 用于核燃料组件的间隔栅格具有引导冷却剂在燃料棒周围的轴向流动并由此产生涡流的双偏转叶片。 叶片各自具有从第一内带向上突出并向一个燃料棒突出的双重弯曲。 叶片在其底部足够宽，以防止在将燃料棒插入电池期间由于与燃料棒接触而导致的意外变形。 叶片还使得间隔栅格出口处的冷却剂通道的横截面积的平滑变化，从而减少了反应器操作期间的压力损失。

公开(公告)号：US06845138B2

公开(公告)日：2005-01-18

申请号：US10215997

申请日：2002-08-07

申请人： Taehyun Chun ,  Dongseok Oh ,  Wangkee In ,  Keenam Song ,  Hyungkyu Kim ,  Heungseok Kang ,  Kyungho Yoon ,  Younho Jung

发明人： Taehyun Chun ,  Dongseok Oh ,  Wangkee In ,  Keenam Song ,  Hyungkyu Kim ,  Heungseok Kang ,  Kyungho Yoon ,  Younho Jung

IPC分类号： G21C3/34 ,  G21C3/322 ,  G21C3/332

CPC分类号： G21C3/332 ,  Y02E30/40

摘要： A spacer grid with hybrid flow-mixing devices for nuclear fuel bundle is made up of an intersection of a plurality of thin straps at right angles to form a plurality of cells for receiving and supporting fuel rods. Each strap is composed of two types of strap units, called a primary strap unit and a secondary strap unit, which are alternately arranged along the strap. The primary strap unit is a strap section having a primary vane set, and a secondary strap unit is a strap section having a secondary vane set. The straps intersect such that, by primary and secondary strap units, each intersection forms a hybrid flow-mixing device around the top of each junction. The primary vane set, consisting of a trapezoidal primary vane stand and two bent primary mixing vanes on both sides, protrudes upwardly from the strap and is primarily for generating cross flow between channels. Meanwhile, the secondary vane set, consisting of a trapezoidal secondary vane stand and two bent primary mixing vanes on both sides, also protrudes upwardly from the strap, but is primarily for swirl flow generation within the channels. The hybrid flow-mixing device induces a complex but effective flow pattern in flow channels for fuel rod cooling.

摘要翻译： 具有用于核燃料束的混合流动混合装置的间隔栅格由多个薄带的交叉点成直角形成用于接收和支撑燃料棒的多个单元。 每个条带由两种类型的带单元组成，称为主带单元和次级带单元，其沿着带交替布置。 主带单元是具有主叶片组的带部分，并且次级带单元是具有次级叶片组的带部分。 带子相交，使得通过初级和次级带单元，每个交叉点在每个结点的顶部周围形成混合流动混合装置。 主叶片组由梯形主叶片架和两侧的两个弯曲的初级混合叶片组成，从带子向上突出，主要用于在通道之间产生交叉流。 同时，由梯形二级叶片支架和两侧的两个弯曲的主要混合叶片组成的次级叶片组也从带子向上突出，但主要用于在通道内产生涡流。 混合流动混合装置在用于燃料棒冷却的流动通道中引起复杂但有效的流动模式。

公开(公告)号：US06514360B2

公开(公告)日：2003-02-04

申请号：US09852953

申请日：2001-05-10

申请人： Yong Hwan Jeong ,  Jong Hyuk Baek ,  Byoung Kwon Choi ,  Kyeong Ho Kim ,  Myung Ho Lee ,  Sang Yoon Park ,  Cheol Nam ,  Younho Jung

发明人： Yong Hwan Jeong ,  Jong Hyuk Baek ,  Byoung Kwon Choi ,  Kyeong Ho Kim ,  Myung Ho Lee ,  Sang Yoon Park ,  Cheol Nam ,  Younho Jung

IPC分类号： C22F118

CPC分类号： C22C16/00 ,  C22F1/186 ,  G21C3/07 ,  Y02E30/40

摘要： Disclosed is a method for manufacturing a tube and a sheet of niobium-containing zirconium alloys for the high burn-up nuclear fuel. The method comprises melting Nb-added zirconium alloy to ingot; forging the ingot at &bgr; phase range; &bgr;-quenching the forged ingot after solution heat-treatment at 1015-1075° C.; hot-working the quenched ingot at 600-650° C.; cold-working the hot-worked ingot in three to five passes, with intermediate vacuum annealing; and final vacuum annealing the cold-worked ingot at 440-600° C., wherein temperatures of intermediate vacuum annealing and final vacuum annealing after &bgr;-quenching are changed so as to attain the condition under which precipitates in the alloy matrix are limited to an average diameter of 80 nm or smaller and the accumulated annealing parameter (&Sgr; A) is limited to 1.0×10−18 hr or lower.

摘要翻译： 公开了一种制造用于高燃耗核燃料的含铌锆合金管和一片材的方法。 该方法包括将Nb添加的锆合金熔化成锭; 在β相范围锻造锭; 在1015-1075°C固溶热处理后，对锻造锭进行β淬火淬火。 在600-650℃下对淬火锭进行热加工; 用三到五道次热处理热加工铸锭，中间真空退火; 在440-600℃下对冷加工锭进行最终真空退火，其中改变了中间真空退火和β淬火后的最终真空退火的温度，以达到将合金基体中的析出物限制在 平均直径为80nm以下，累积退火参数（SIGMA A）为1.0×10-18hr以下。